76 DREER'S VEGETABLES UNDER GLASS. 
From an 1896 note book we take the following figures 
and estimates concerning a rhubarb house near Boston : Sashes 
needed to cover the framework, 320; rhubarb pulled only 
once; average yield estimated at 20 pounds to the sash; 
average price 714 cents per pound; estimated gross receipts, 
$480. This means $1.50 per sash. 
The rhubarb in this case is planted two feet apart each 
way. It is well cultivated, and fertilized generously with 
cow manure and hog manure. The glass is put on the house 
about the middle of February, and removed after a total 
service of four to six weeks, and then used over radishes in 
frames. The house is provided with steam pipes. No 
watering is done. The whole cost, above cultivation and 
mianuring, is the labor each year of handling the sashes ; in 
putting them on and removing them from the framework of 
the house. Except during the early spring the house is 
wholly open to the weather. The roots are not. moved. 
The varieties of rhubarb most commonly grown are 
Linnzus, Victoria and, Paragon. _Some growers have a 
decided preference about variety; others do not know the 
name of their own strain, depending wholly on cultural 
methods for success. 
Kohl-rabi or turnip-roote 1 cabbage is sown in January 
and February in cold frames by the Philadelphia market 
gardeners. The Early White Vienna is a favorite sort for 
sowing at this time of the year. The voung plants are set 
in the open ground for their subsequent development. 
